ConstructionPro Week, Volume: 5 - Issue: 28 - 07/15/2016

Big Bertha Gets New Teeth

SInce being placed back into operation this past winter after a two-year repair project, the tunnel boring machine for Seattle's Alaskan Way viaduct project has been making good progress. Recently it paused for a routine inspection and maintenance checkup, including replacing cutter heads. This is especially difficult work as it has to be performed 120 feet below ground under hyperbaric conditions. Read more about the maintenance work here.